Connecting-rod for engines.



PATENTED JAN. 30, 1906.

APPLICATION FILED SEPT. 23, 1905.

J STUART CONNECTING ROD FOR ENGINES.

'WITNEEUJE 55* "UNITED srArns PATENT OFFICE.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed September 23 1905. Serial No. 279,790-

To all whom it may concern.-

Be it known that I, JOHN STUART, a citizen of the United States, residing at Wollaston, in the county of Norfolk and State of Massa chusetts, have invented new and useful Improvements in Connecting-Rods for Engines, of which the following is a specification.

This invention relates to connecting-rods for engines, and is particularly ada ted to connecting-rods for high-speed gaso ene-engines.

The object of the invention is to provide a connecting-rod which comprises in its con struction a convenient means for lubricating the crank-pin'o'f the crank-shaft to'which one end of said connecting-rod is attached, and to this end the connecting-rod is provided with a chamber adapted to contain lubricating material in solid'form, such as grease, and connected by an'outlet-passage at one end thereof with the bearing formed in the'adjacent end of said connecting-rod and encircling the crank-pin, and also provided. With-an inletorifice constructed to enable the grease to be readily inserted in saidchamber, and after being inserted means to lock the orifice through which it is inserted, so that the same cannot leak out of the chamber.

The invention consists in the combination and arrangement of parts-set forth in the following specification, and particularly pointed out in the claims thereof.

' 7 Referring to the drawings, Figure 1 is a side elevation of a connecting-rod constructed in. accordance with my'invention, showing the same connected to the crank-pin of a cranlc shaft. Fig. 2 is a section, partlyin elevation, taken on line 22 of Fig.1. Fig. 3 is a transverse section of the connecting-rod, taken on line 3 3 of Fig. 1. Fig. 4 is a transverse section of the connecting-rod, taken on line 4 d of Fl 1. l

.llilike numerals refer to like parts throughout the several views of the drawin s. in the drawings, his myimproved connect ing-rod 7 a portion of a crank-shaft of an en gine 8 8, the c'ranlcarma and 9 the crank-pin. The connecting-rod 6 has bearings 10 and 11', formed in the opposite ends, thereof/respectively. At the end adjacent to the crank-pin 9 said connecting-rod is made rectangular in.

cross-section, as shbwn in Fig. 4, for a ortion. of its length, the remainder of its lengt being ribbed to form an eye-beam structure, such as illustrated in Fig. 3. The rectangular portion 12 of, said connecting rod is provided with a chamber 13, extendin longitudinally thereof. One end of said member is connected to the bearing 11. by an outlet-passage 1a, in which is located a check-valve 15 of any suitable construction. Adjacent-to the opposite end of said chamber from that in which said check-valve is located a supplypassage 16 is provided, which extends through one o the walls l.7 of said chamber. Saidsupply-passe e is preferably cylindrical and is inclined or eveled to form a seat for a conical-shaped valve 18, which has a hollow cylindrical stem 19 fast thereto and projecting into the chamber 13 and engaginga cylin drical shank 20, which is integral with a cylindrical plug 21, having screw-threaded engagement with the wall 22 of the chamber 13.

A spiral spring 23 encircles the hollow stein v 19 and also the cylindrical shank 20 and bears at one .end against the valve 18 and at the other end thereof against the plug 21', thus holding said valve 18 normally closed or in the position illustrated in Fig. 2.

, Grease is conveniently and neatly inserted in. a solidform in the interior of the chamber 13 by means of an ordinary piston force pump, the end of which is placed against the outer side of the valve 18, and by pressing with the pump against the valve said valve is forced downwardly into the chamber 13,

the spring 23 yielding under pressure and al lowing the valve 18 to slide upon the shank 2(3- until the end. of the" pump passes through the supplypassage 16 into the interior of t e chamber 13, when by forcing the piston" lengthwise of the pump the grease contained in the pumpmylinder'is forced through oriiices provided in said cylinder at the end thereof into theinterior of the chamber 13.

As soon as said chamber is filled by this means with grease the sump is withdrawn and the valve is closed by means of the spring 23,

thus sealing the supplyassage 16 so that none of the grease in the c amber 13 can leak outthereof. The grease passes thro'u h the outlet-passage l4 and by the check-va vs 15 to the bearing lLwhere it becomes liquefied and lubricates the crankepin 9. By this means high-speed engine crank-Shafts may be lubricated with grease, so that they may be run at high speed Without heating and the exterior of the connecting-rod and adjacent parts be free fromany superfluous grease or oil.

- said poc riphery of the crank-pin 9, and as the rease It is evident that while I prefer using a valve such as hereinbefore described the' supply-passage 16 may be closed by other means; such as a screw-plug, without departing from the spirit of'my invention.

In order to still further lubricate the crankpin 9, a 1pocket 24 is provided in the cap 25, et opening inwardly upon the pepasses from the chamber 13 to the cran ,-pin, as hereinbefore described, a portion of it passes around upon the peri hery of said crank-pin and clears in the pocliet 24, so that there is always a fresh sup ly of grease upon both sides of the crank-pin to prevent the same from becoming heated during the rapid rotation thereof.

Having thus described my invention,what I claim, and desire by Letters Patent to secure, is

1. A connecting-rod forengines provided with a chamber extending longitudinally thereof and with an outlet-passage leading out of one ,end thereof into a bearing formed upon said connecting-rod, together with a supplyassage extending through one of the side we ls of said chamber, a valve located in i said supply-passage, and a spring in said chamber, one end bearing againstsaid valve.

2.'A connecting-rod for engines provided with a chamber extending longitudinally thereof and with an outletpassage leading out of one end thereof into a bearing formed upon said connecting-rod, together-with a.

sup ly-passage extending through one of the Wal s of said chamber, a valve located in said sup ly-passage, a screw-plug in one wall of sai chamber in the opposite side thereof from that in which said valve is located, said lug being in alinement with said valve,there eing a shank on said plug projecting into said chamber, and a spring in said chamber one end bearing against said valve the other end encircling said shank andbearing'against said plug. i

3. A connecting-rod for engines having a bearing formed in each of its opposite ends, a portion of said rod adjacent to one of said bearings rectangular in cross-section and provided with a chamber extending longitudinally thereof, one end of said chamber connected to said bearingby an outlet-passage, a check-valve in said outlet-passage, the other end of said chamber provided with a supply passage extending through one of walls of said chamber, means to close said supply-passage, a capfast to said connecting-rod in whicha portion. of said bearing is formed, and a pocket adapted to contain lubricating material located in said cap and opening inwardly therefrom into said hearmg. i

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN STUART.

' Witnesses:

CHARLES S; GoonING,

ANNIE J. PAILEY.

supply-passage extending through one of the the walls of said chamber, a valve located in 

